Stereo Audio Codec with USB Interface, Single-Ended Analog … · 2020. 12. 31. · Burr-Brown Audio Not Recommended for New Designs PCM2903B SLES228 – DECEMBER 2008 STEREO AUDIO

Burr-Brown Audio

Not Recommended for New Designs

PCM2903B

www.ti.com SLES228 –DECEMBER 2008

STEREO AUDIO CODEC WITH USB INTERFACE,SINGLE-ENDED ANALOG INPUT/OUTPUT, AND S/PDIF

Check for Samples: PCM2903B

1FEATURES • Stereo DAC:– Analog Performance at VCCC = VCCP1 = VCCP2234• On-Chip USB Interface:

= VCCX = VDD = 3.3 V:– With Full-Speed Transceivers– THD+N = 0.005%– Fully Compliant with USB 2.0 Specification– SNR = 96 dB– Certified by USB-IF– Dynamic Range = 93 dB– Partially Programmable Descriptors (1)

– Oversampling Digital Filter:– USB Adaptive Mode for Playback– Passband Ripple = ±0.1 dB– USB Asynchronous Mode for Record– Stop-Band Attenuation = –43 dB– Self-Powered

– Single-Ended Voltage Output• 16-Bit Delta-Sigma ADC and DAC– Analog LPF Included• Sampling Rates:

• Multifunctions:– DAC: 32, 44.1, 48 kHz– Human Interface Device (HID) Function:– ADC: 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz

– Volume and and Mute Controls• On-Chip Clock Generator With Single 12-MHz– Suspend Flag FunctionClock Source

• 28-Pin SSOP Package• S/PDIF Input/Output• Single Power Supply:

APPLICATIONS– 3.3 V Typical

• USB Audio Speaker• Stereo ADC:• USB Headset– Analog Performance at VCCC = VCCP1 = VCCP2• USB Monitor= VCCX = VDD = 3.3 V:• USB Audio Interface Box– THD+N = 0.01%

– SNR = 89 dBDESCRIPTION

– Dynamic Range = 89 dBThe PCM2903B is Texas Instruments' single-chip,

– Decimation Digital Filter: USB, stereo audio codec with a USB-compliant full-speed protocol controller and S/PDIF. The USB– Passband Ripple = ±0.05 dBprotocol controller requires no software code, but the– Stop-Band Attenuation = –65 dBUSB descriptors can be modified in some areas (for

– Single-Ended Voltage Input example, vendor ID and/or product ID). The– Antialiasing Filter Included PCM2903B employs SpAct™ architecture, TI's

unique system that recovers the audio clock from– Digital HPF IncludedUSB packet data. On-chip analog PLLs with SpActenable playback and record with low clock jitter aswell as independent playback and record samplingrates.(1) The descriptor can be modified by changing a mask.

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2SpAct is a trademark of Texas Instruments.3System Two, Audio Precision are trademarks of Audio Precision, Inc.4All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date. Copyright © 2008, Texas Instruments IncorporatedProducts conform to specifications per the terms of the TexasInstruments standard warranty. Production processing does notnecessarily include testing of all parameters.

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Not Recommended for New DesignsPCM2903B

SLES228 –DECEMBER 2008 www.ti.com

This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled withappropriate precautions. Failure to observe proper handling and installation procedures can cause damage.

ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be moresusceptible to damage because very small parametric changes could cause the device not to meet its published specifications.

PACKAGE/ORDERING INFORMATION (1)

SPECIFIED TRANSPORTPACKAGE TEMPERATURE PACKAGE ORDERING MEDIA,

PRODUCT PACKAGE-LEAD DESIGNATOR RANGE MARKING NUMBER QUANTITY

PCM2903BDB Rails, 47PCM2903BDB SSOP-28 DB –25°C to 85°C PCM2903B Tape and Reel,PCM2903BDBR 2000

(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TIwebsite at www.ti.com.

ABSOLUTE MAXIMUM RATINGS (1)

Over operating free-air temperature range (unless otherwise noted).

PARAMETER PCM2903B UNIT

Supply voltage, VCCC, VCCP1, VCCP2, VCCX, VDD –0.3 to 4 V

Supply voltage differences, VCCC, VCCP1, VCCP2, VCCX, VDD ±0.1 V

Ground voltage differences, AGNDC, AGNDP, AGNDX, DGND, DGNDU ±0.1 V

SEL0, SEL1, DIN –0.3 to 6.5 VDigital input voltage

D+, D–, HID0, HID1, HID2, XTI, XTO, DOUT, SSPND –0.3 to (VDD + 0.3) < 4 V

Analog input voltage VINL, VINR, VCOM, VOUTR, VOUTL –0.3 to (VCCC + 0.3) < 4 V

Input current (any pins except supplies) ±10 mA

Ambient temperature under bias –40 to +125 °C

Storage temperature, Tstg –55 to +150 °C

Junction temperature TJ +150 °C

Lead temperature (soldering, 5s) +260 °C

Package temperature (IR reflow, peak) +250 °C

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratingsonly, and functional operation of the device at these or any other conditions beyond those indicated under is not implied. Exposure toabsolute-maximum-rated conditions for extended periods may affect device reliability.

2 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated

Product Folder Links: PCM2903B

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Not Recommended for New Designs PCM2903B


ELECTRICAL CHARACTERISTICSAll specifications at TA = +25°C, VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unlessotherwise noted.

PCM2903B

PARAMETER TEST CONDITIONS MIN TYP MAX UNIT

DIGITAL INPUT/OUTPUT

Host interface Apply USB Revision 2.0, full speed

Audio data format USB isochronous data format

INPUT LOGIC

D+, D– 2 VDD

XTI, HID0, HID1, and 0.7 VDD VDDHigh-level input HID2VIH VDCvoltageSEL0, SEL1 2 5.25

DIN 0.7 VDD 5.25

D+, D– 0.8

XTI, HID0, HID1, and 0.3 VDDLow-level input HID2VIL VDCvoltageSEL0, SEL1 0.8

DIN 0.3 VDD

D+, D–, XTI, SEL0, VIN = 3.3 V ±10SEL1High-level inputIIH μAcurrent HID0, HID1, and HID2 VIN = 3.3 V 50 80DIN VIN = 3.3 V 65 100

D+, D–, XTI, SEL0, VIN = 0 V ±10SEL1Low-level inputIIL μAcurrent HID0, HID1, and HID2 VIN = 0 V ±10DIN VIN = 0 V ±10

OUTPUT LOGIC

D+, D– 2.8High-level outputVOH DOUT IOH = –4 mA 2.8 VDCvoltage

SSPND IOH = –2 mA 2.8

D+, D– 0.3Low-level outputVOL DOUT IOL = 4 mA 0.5 VDCvoltage

SSPND IOL = 2 mA 0.5

CLOCK FREQUENCY

Input clock frequency, XTI 11.994 12 12.006 MHz

Copyright © 2008, Texas Instruments Incorporated Submit Documentation Feedback 3


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ELECTRICAL CHARACTERISTICS (continued)All specifications at TA = +25°C, VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unlessotherwise noted.

PCM2903B


ADC CHARACTERISTICS

Resolution 8, 16 Bits

Audio data channel 1, 2 Channel

ADC Clock Frequency

fS Sampling frequencies 8, 11.025, 16, 22.05, 32, 44.1, 48 kHz

ADC DC Accuracy

% ofGain mismatch, channel-to-channel ±1 ±5 FSR

% ofGain error ±2 ±10 FSR

% ofBipolar zero error ±0 FSR

ADC Dynamic Performance (1)

VIN = –1 dB 0.01 0.02 %THD+N Total harmonic distortion plus noise

VIN = –60 dB 5 %

Dynamic range A-weighted 81 89 dB

SNR Signal-to-noise ratio A-weighted 81 89 dB

Channel separation 80 85 dB

Analog Input

Input voltage 0.6 VCCC VPP

Center voltage 0.5 VCCC V

Input impedance 30 kΩ–3 dB 150 kHz

Antialising filter frequency responsefIN = 20 kHz –0.08 dB

ADC Digital Filter Performance

Passband 0.454 fS Hz

Stop band 0.583 fS Hz

Passband ripple ±0.05 dB

Stop-band attenuation –65 dB

td Delay time 17.4/fS s

HPF frequency response –3 dB 0.078 fS/1000 Hz

(1) fIN = 1 kHz, using a System Two™ audio measurement system by Audio Precision™ in RMS mode with a 20-kHz LPF and 400-Hz HPFin the calculation.






ELECTRICAL CHARACTERISTICS (continued)All specifications at TA = +25°C, VCCC = VCCP1 = VCCP2 = VCCX = VDD = 3.3 V, fS = 44.1 kHz, fIN = 1 kHz, 16-bit data, unlessotherwise noted.

PCM2903B


DAC CHARACTERISTICS

Resolution 8, 16 Bits

Audio data channel 1, 2 Channel

DAC Clock Frequency

fS Sampling frequencies 32, 44.1, 48 kHz

DAC DC Accuracy

% ofGain mismatch channel-to-channel ±1 ±5 FSR

% ofGain error ±2 ±10 FSR

% ofBipolar zero error ±2 FSR

DAC Dynamic Performance (2)

VOUT = 0 dB 0.005 0.016 %THD+N Total harmonic distortion plus noise

VOUT = –60 dB 3 %

Dynamic range EIAJ, A-weighted 87 93 dB

SNR Signal-to-noise ratio EIAJ, A-weighted 90 96 dB

Channel separation 86 92 dB

Analog Output

VO Output voltage 0.6 VCCC VPP

Center voltage 0.5 VCCC V

Load impedance AC coupling 10 kΩ–3 dB 250 kHz

LPF frequency responsef = 20 kHz –0.03 dB

DAC Digital Filter Performance

Passband 0.445 fS Hz

Stop band 0.555 fS Hz

Passband ripple ±0.1 dB

Stop-band attenuation –43 dB

td Delay time 14.3/fS s

POWER-SUPPLY REQUIREMENTS

VDD,VCCC,VCCP1, Voltage range 3 3.3 3.6 VDCVCCP2,VCCX

ADC, DAC operation 54 70 mASupply current

Suspend mode (3) 250 μAADC, DAC operation 178 252 mW

PD Power dissipationSuspend mode (3) 0.83 mW

TEMPERATURE RANGE

Operating temperature range –25 +85 °C

θJA Thermal resistance 100 °C/W

(2) fOUT = 1 kHz, using a System Two audio measuerment system by Audio Precision in RMS mode with a 20-kHz LPF and 400-Hz HPF.(3) Under USB suspend state.




1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

D+

D–

VBUS

DGNDU

HID0

HID1

HID2

SEL0

SEL1

VCCC

AGNDC

V LIN

V RIN

VCOM

SSPND

DIN

VCCX

AGNDX

XTO

VCCP2

DGND

VCCP1

V LOUT

XTI

DOUT

VDD

AGNDP

V ROUT

P0007-07

PCM2903B



PIN ASSIGNMENTS

DB PACKAGESSOP-28

(TOP VIEW)

Table 1. TERMINAL FUNCTIONS

TERMINAL

NAME NO. I/O DESCRIPTION

AGNDC 11 – Analog ground for codec

AGNDP 18 – Analog ground for PLL

AGNDX 22 – Analog ground for oscillator

D– 2 I/O USB differential input/output minus (1)

D+ 1 I/O USB differential input/output plus (1)

DGND 26 – Digital ground

DGNDU 4 – Digital ground for USB transceiver

DIN 24 I S/PDIF input (2)

DOUT 25 O S/PDIF output

HID0 5 I HID key state input (mute), active-high (3)

HID1 6 I HID key state input (volume up), active-high (3)

HID2 7 I HID key state input (volume down), active-high (3)

SEL0 8 I Must be set to high (4)

SEL1 9 I Connected to the USB port of VBUS(4)

SSPND 28 O Suspend flag, active-low (Low: suspend, High: operational)

VBUS 3 – Must be connected to VDD

VCCC 10 – Analog power supply for codec(5)

VCCP1 17 – Analog power supply for PLL(5)

VCCP2 19 – Analog power supply for PLL(5)

VCCX 23 – Analog power supply for oscillator(5)

VCOM 14 – Common for ADC/DAC (VCCC/2)(5)

VDD 27 – Digital power supply(5)

VINL 12 I ADC analog input for L-channel

VINR 13 I ADC analog input for R-channel

VOUTL 16 O DAC analog output for L-channel

VOUTR 15 O DAC analog output for R-channel

XTI 21 I Crystal oscillator input (6)

(1) LV-TTL level.(2) 3.3-V CMOS-level input with internal pulldown, 5-V tolerant.(3) 3.3-V CMOS-level input with internal pulldown. This pin informs the PC of serviceable control signals such as mute, volume up, or

volume down, which have no direct connection with the internal DAC or ADC. See the Interface #3 and End-Points sections.(4) TTL Schmitt trigger, 5-V tolerant.(5) Connect a decoupling capacitor to GND.(6) 3.3-V CMOS-level input.






Table 1. TERMINAL FUNCTIONS (continued)TERMINAL

NAME NO. I/O DESCRIPTION

XTO 20 O Crystal oscillator output




SSPND

S/PDIF DecoderDIN

Lock

ADC

V LIN

V RIN

VCOM

FIFO

Selector

AnalogPLL

AnalogPLL

FIFO

US

B S

IE

XC

VR

DAC

V LOUT

V ROUT

S/PDIF EncoderDOUT

XTI XTO12 MHz

PLL ( 8)´96 MHz Tracker

(SpAct)

USBProtocol

Controller

PowerManager

ISO-InEnd-Point

ControlEnd-Point

ISO-OutEnd-Point

HIDEnd-Point

D+

D–

SEL0

SEL1

HID0

HID1

HID2

VBUS

VCCC VCCP1 VCCP2 VCCX VDD DGNDUDGNDAGNDXAGNDPAGNDC

B0239-02



FUNCTIONAL BLOCK DIAGRAM




V RIN13

14

VCOM

4.7 Fm30 kW

++

––

Delta-SigmaModulator

(+)

(–)

Reference

(V /2)CCC10 Fm

+

+

S0011-07



BLOCK DIAGRAM OF ANALOG FRONT-END (RIGHT CHANNEL)




85

87

89

91

93

95

2.8 3.0 3.2 3.4 3.6 3.8

VCC − Supply V oltage − V

Dyn

amic

Ran

ge a

nd S

NR

− d

B

SNR

Dynamic Range

G004

0.003

0.004

0.005

0.006

0.007

0.008

0.009

0.010

2.8 3.0 3.2 3.4 3.6 3.8


TH

D+N

− T

otal

Har

mon

ic D

isto

rtion

+ N

oise

− %

G003

0.003

0.004

0.005

0.006

0.007

0.008

0.009

0.010

−50 −25 0 25 50 75 100

TA − Free-Air T emperature − °C

TH

D+N

− T

otal

Har

mon

ic D

isto

rtion

+ N

oise

− %

G001

85

87

89

91

93

95

−50 −25 0 25 50 75 100


Dyn

amic

Ran

ge a

nd S

NR

− d

B

SNR

Dynamic Range

G002



TYPICAL CHARACTERISTICS: ADCAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.

TOTAL HARMONIC DISTORTION + NOISE at –1 dB DYNAMIC RANGE and SNRvs vs

FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE

Figure 1. Figure 2.


SUPPLY VOLTAGE SUPPLY VOLTAGE

Figure 3. Figure 4.




0.003

0.004

0.005

0.006

0.007

0.008

−50 −25 0 25 50 75 100


TH

D+N

− T

otal

Har

mon

ic D

isto

rtion

+ N

oise

− %

G007

90

91

92

93

94

95

96

97

98

−50 −25 0 25 50 75 100


Dyn

amic

Ran

ge a

nd S

NR

− d

B

SNR

Dynamic Range

G008

85

87

89

91

93

95

30 35 40 45 50

fS − Sampling Frequency − kHz

Dyn

amic

Ran

ge a

nd S

NR

− d

B

SNR

Dynamic Range

G006

0.003

0.004

0.005

0.006

0.007

0.008

0.009

0.010

30 35 40 45 50


TH

D+N

− T

otal

Har

mon

ic D

isto

rtion

+ N

oise

− %

G005



TYPICAL CHARACTERISTICS: ADC (continued)All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unlessotherwise noted.


SAMPLING FREQUENCY SAMPLING FREQUENCY

Figure 5. Figure 6.

TYPICAL CHARACTERISTICS: DACAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.

TOTAL HARMONIC DISTORTION + NOISE at 0 dB DYNAMIC RANGE and SNRvs vs

FREE-AIR TEMPERATURE FREE-AIR TEMPERATURE

Figure 7. Figure 8.




0.003

0.004

0.005

0.006

0.007

0.008

30 35 40 45 50


TH

D+N

− T

otal

Har

mon

ic D

isto

rtion

+ N

oise

− %

G011

90

91

92

93

94

95

96

97

98

30 35 40 45 50

fS Sampling Frequency kH-- z

Dy

na

mic

Ra

ng

e a

nd

SN

Rd

B-

SNR

Dynamic Range

G012

0.003

0.004

0.005

0.006

0.007

0.008

3.0 3.1 3.2 3.3 3.4 3.5 3.6


TH

D+N

− T

otal

Har

mon

ic D

isto

rtion

+ N

oise

− %

G009

90

91

92

93

94

95

96

97

98

3.0 3.1 3.2 3.3 3.4 3.5 3.6


Dyn

amic

Ran

ge a

nd S

NR

− d

B SNR

Dynamic Range

G010



TYPICAL CHARACTERISTICS: DAC (continued)All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unlessotherwise noted.


SUPPLY VOLTAGE SUPPLY VOLTAGE

Figure 9. Figure 10.


SAMPLING FREQUENCY SAMPLING FREQUENCY





f − Frequency − kHz

−140

−120

−100

−80

−60

−40

−20

0

0 5 10 15 20

Am

plitu

de −

dB

G015f − Frequency − kHz

−140

−120

−100

−80

−60

−40

−20

0

0 5 10 15 20

Am

plitu

de −

dB

G016


−140

−120

−100

−80

−60

−40

−20

0

0 5 10 15 20

Am

plitu

de −

dB

G013f − Frequency − kHz

−140

−120

−100

−80

−60

−40

−20

0

0 5 10 15 20A

mpl

itude

− d

B

G014



TYPICAL CHARACTERISTICS: ADC OUTPUT SPECTRUMAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.

OUTPUT SPECTRUM (–1 dB, N = 8192) OUTPUT SPECTRUM (–60 dB, N = 8192)


TYPICAL CHARACTERISTICS: DAC OUTPUT SPECTRUMAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.

OUTPUT SPECTRUM (0 dB, N = 8192) OUTPUT SPECTRUM (–60 dB, N = 8192)





I CC

− S

uspe

nd S

uppl

y C

urre

nt −

mA

0

10

20

30

40

50

60

70

80

3.0 3.1 3.2 3.3 3.4 3.5 3.6

VDD, VCCC, VCCP1, VCCP2, VCCX − Supply V oltage − V

I CC

− O

pera

tiona

l Sup

ply

Cur

rent

− m

A

Operational

Suspend

1.6

1.2

0.2

0.0

0.4

1.0

0.8

0.6

1.4

G017

0

10

20

30

40

50

60

70

80

30 35 40 45 50


I CC

− O

pera

tiona

l Sup

ply

Cur

rent

− m

A

ADC and DAC

G018



TYPICAL CHARACTERISTICS: SUPPLY CURRENTAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.

OPERATIONAL and SUSPEND SUPPLY CURRENT OPERATIONAL SUPPLY CURRENTvs vs

SUPPLY VOLTAGE SAMPLING FREQUENCY





Frequency [ � fS]

−0.8

−0.6

−0.4

−0.2

0.0

0.2

0.0 0.1 0.2 0.3 0.4 0.5

Am

plitu

de −

dB

0.0

G021Frequency [ � fS]

−20

−16

−12

−8

−4

0

0.46 0.48 0.50 0.52 0.54

Am

plitu

de −

dB

G022

Am

plitu

de −

dB

−160

−140

−120

−100

−80

−60

−40

−20

0

0 8 16 24 32

Frequency [ � fS]G019

Frequency [ � fS]

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

0.0 0.2 0.4 0.6 0.8 1.0A

mpl

itude

− d

B

G020



TYPICAL CHARACTERISTICS: ADC DIGITAL DECIMATION FILTER FREQUENCY RESPONSEAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.

OVERALL CHARACTERISTICS STOP-BAND ATTENUATION


PASSBAND RIPPLE TRANSITION-BAND RESPONSE





−50

−40

−30

−20

−10

0


Am

plitu

de −

dB

1 100 1k 10k10

G025

−1.0

−0.8

−0.6

−0.4

−0.2

0.0


Am

plitu

de −

dB

0.01 1 10 1000.1

0.0

G026

Frequency [ � fS/1000]

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

0.0 0.1 0.2 0.3 0.4

Am

plitu

de −

dB

G023Frequency [ � fS/1000]

−1.0

−0.8

−0.6

−0.4

−0.2

0.0

0 1 2 3 4A

mpl

itude

− d

B

0.0

G024



TYPICAL CHARACTERISTICS: ADC DIGITAL HIGH-PASS FILTER FREQUENCY RESPONSEAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.

STOP-BAND CHARACTERISTICS PASSBAND CHARACTERISTICS


TYPICAL CHARACTERISTICS: ADC ANALOG ANTIALIASING FILTER FREQUENCY RESPONSEAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.






Frequency [ � fS]

−20

−18

−16

−14

−12

−10

−8

−6

−4

−2

0

0.46 0.47 0.48 0.49 0.50 0.51 0.52 0.53 0.54

Am

plitu

de −

dB

G029

Frequency [ � fS]

−0.8

−0.6

−0.4

−0.2

0.0

0.2

0.0 0.1 0.2 0.3 0.4 0.5

Am

plitu

de −

dB

0.0

G028Frequency [ � fS]

−100

−90

−80

−70

−60

−50

−40

−30

−20

−10

0

0 1 2 3 4

Am

plitu

de −

dB

G027



TYPICAL CHARACTERISTICS: DAC DIGITAL INTERPOLATION FILTER FREQUENCYRESPONSE

All specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unlessotherwise noted.

STOP-BAND ATTENUATION PASSBAND RIPPLE


TRANSITION-BAND RESPONSE

Figure 29.




−50

−40

−30

−20

−10

0


Am

plitu

de −

dB

1 100 1k 10k10

G032

−1.0

−0.8

−0.6

−0.4

−0.2

0.0


Am

plitu

de −

dB

0.01 1 10 1000.1

0.0

G033

−50

−40

−30

−20

−10

0

0 8 16 24 32

Frequency [ � fS]

Am

plitu

de −

dB

G030

−0.8

−0.6

−0.4

−0.2

0.0

0.2

0.0 0.1 0.2 0.3 0.4 0.5

Frequency [ � fS]

Am

plitu

de −

dB

0.0

G031



TYPICAL CHARACTERISTICS: DAC ANALOG FIR FILTER FREQUENCY RESPONSEAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.



TYPICAL CHARACTERISTICS: DAC ANALOG LOW-PASS FILTER FREQUENCY RESPONSEAll specifications at TA = +25°C, VDD = VCCC = VCCP1 = VCCP2 = VCCx = 3.3 V, fs = 44.1 kHz, fIN = 1 kHz, 16-bit data, unless

otherwise noted.








DETAILED DESCRIPTION

USB INTERFACE

Control data and audio data are transferred to the PCM2903B via D+ (pin 1) and D– (pin 2). All data to/from thePCM2903B are transferred at full speed. The device descriprtor contains the information described in Table 2.The device descriptor can be modified on request; contact a Texas Instruments representative for details.

Table 2. Device Descriptor

USB revision 2.0 compliant

Device class 0x00 (device-defined interface level)

Device subclass 0x00 (not specified)

Device protocol 0x00 (not specified)

Max packet size for end-point 0 8 bytes

Vendor ID 0x08BB (default value, can be modified)

Product ID 0x29B3 (default value, can be modified)

Device release number 1.0 (0x0100)

Number of configurations 1

Vendor strings String #1 (see Table 4)

Product strings String #2 (see Table 4)

Serial number Not supported

The configuration descriptor contains the information described in Table 3. The configuration descriptor can bemodified on request; contact a Texas Instruments representative for details.

Table 3. Configuration Descriptor

Interface Four interfaces

Power attribute 0xC0 (Self-powered, no remote wakeup)

Maximum power 0x0A (20 mA. Default value, can be modified)

The string descriptor contains the information described in Table 4. The string descriptor can be modified onrequest; contact a Texas Instruments representative for details.

Table 4. String Descriptor

#0 0x0409

#1 Burr-Brown from TI (default value, can be modified)

#2 USB Audio CODEC (default value, can be modified)




Analog Out

Analog In

Default End-Point

End-Point #2(IF #1)

Audio Streaming Interface

End-Point #0

End-Point #4(IF #2)

Audio Streaming Interface

End-Point #5(IF #3)

HID Interface

ITTID1

FU

UID3

OTTID5

OTTID2

ITTID4

Standard Audio Control Interface (IF #0)

PCM2903B

M0024-04



DEVICE CONFIGURATON

Figure 34 illustrates the USB audio function topology. The PCM2903B has four interfaces. Each interfaceconsists of alternative settings.

Figure 34. USB Audio Function Topology






Interface #0

Interface #0 is the control interface. Alternative setting #0 is the only possible setting for interface #0. Alternativesetting #0 describes the standard audio control interface. The audio control interface consists of a singleterminal. The PCM2903B has the following five terminals:• Input terminal (IT #1) for isochronous-out stream• Output terminal (OT #2) for audio analog output• Feature unit (FU #3) for DAC digital attenuator• Input terminal (IT #4) for audio analog input• Output terminal (OT #5) for isochronous-in stream

Input terminal #1 is defined as USB stream (terminal type 0x0101). Input terminal #1 can accept two-channelaudio streams consisting of left and right channels. Output terminal #2 is defined as a speaker (terminal type0x0301). Input terminal #4 is defined as a microphone (terminal type 0x0201). Output terminal #5 is defined as aUSB stream (terminal type 0x0101). Output terminal #5 can generate two-channel audio streams composed ofleft and right channel data. Feature unit #3 supports the following sound control features:• Volume control• Mute control

The built-in digital volume controller can be manipulated by an audio class specific request from 0 dB to –64 dBin 1-dB steps. Changes are made by incrementing or decrementing by one step (1 dB) for every 1/fS time intervaluntil the volume level has reached the requested value. Each channel can be set for different values. The mastervolume control is not supported. A request to the master volume is stalled and ignored. The built-in digital mutecontroller can be manipulated by audio class-specific request. A master mute control request is acceptable. Arequest to an individual channel is stalled and ignored.

Interface #1

Interface #1 is the audio streaming data-out interface. Interface #1 has the five alternative settings described inTable 5. Alternative setting #0 is the zero-bandwidth setting.

Table 5. Interface #1 Alternative Settings

ALTERNATIVE TRANSFER SAMPLING RATESETTING DATA FORMAT MODE (kHz)

00 Zero bandwidth

01 16-bit Stereo Twos complement (PCM) Adaptive 32, 44.1, 48

02 16-bit Mono Twos complement (PCM) Adaptive 32, 44.1, 48

03 8-bit Stereo Twos complement (PCM) Adaptive 32, 44.1, 48

04 8-bit Mono Twos complement (PCM) Adaptive 32, 44.1, 48






Interface #2

Interface #2 is the audio streaming data-in interface. Interface #2 has the 19 alternative settings described inTable 6. Alternative setting #0 is the zero-bandwidth setting. All other alternative settings are operational settings.

Table 6. Interface #2 Alternative Settings

ALTERNATIVE TRANSFER SAMPLING RATESETTING DATA FORMAT MODE (kHz)

00 Zero bandwidth

01 16-bit Stereo Twos complement (PCM) Asynchronous 48

02 16-bit Mono Twos complement (PCM) Asynchronous 48

03 16-bit Stereo Twos complement (PCM) Asynchronous 44.1

04 16-bit Mono Twos complement (PCM) Asynchronous 44.1


06 16-bit Mono Twos complement (PCM) Asynchronous 32

07 16-bit Stereo Twos complement (PCM) Asynchronous 22.05

08 16-bit Mono Twos complement (PCM) Asynchronous 22.05


0A 16-bit Mono Twos complement (PCM) Asynchronous 16

0B 8-bit Stereo Twos complement (PCM) Asynchronous 16

0C 8-bit Mono Twos complement (PCM) Asynchronous 16

0D 8-bit Stereo Twos complement (PCM) Asynchronous 8

0E 8-bit Mono Twos complement (PCM) Asynchronous 8

0F 16-bit Stereo Twos complement (PCM) Synchronous 11.025

10 16-bit Mono Twos complement (PCM) Synchronous 11.025

11 8-bit Stereo Twos complement (PCM) Synchronous 11.025

12 8-bit Mono Twos complement (PCM) Synchronous 11.025

Interface #3

Interface #3 is the interrupt data-in interface. Alternative setting #0 is the only possible setting for interface #3.Interface #3 consists of the HID consumer control device and reports the status of these three key parameters:• Mute (0xE209)• Volume up (0xE909)• Volume down (0xEA09)

End-Points

The PCM2903B has the following four end-points:• Control end-point (EP #0)• Isochronous-out audio data stream end-point (EP #2)• Isochronous-in audio data stream end-point (EP #4)• HID end-point (EP #5)

The control end-point is a default end-point. The control end-point is used to control all functions of thePCM2903B by the standard USB request and an USB audio class specific request from the host. Theisochronous-out audio data stream end-point is an audio sink end-point, which receives the PCM audio data. Theisochronous-out audio data stream end-point accepts the adaptive transfer mode. The isochronous-in audio datastream end-point is an audio source end-point that transmits the PCM audio data. The isochronous-in audio datastream end-point uses asynchronous transfer mode. The HID end-point is an interrupt-in end-point. HID end-point reports HID0, HID1, and HID2 pin status every 32 ms.

The human interface device (HID) pins are defined as consumer control devices. The HID function is designedas an independent end-point from both isochronous-in and -out end-points. Therefore, the result obtained fromthe HID operation depends on the host software. Typically, the HID function is used as the primary audio-outdevice.






Clock and Reset

The PCM2903B requires a 12-MHz (±500 ppm) clock for the USB and audio function, which can be generated bya built-in crystal oscillator with a 12-MHz crystal resonator or supplied by an external clock. The 12-MHz crystalresonator must be connected to XTI (pin 21) and XTO (pin 20) with one high (1-MΩ) resistor and two smallcapacitors, the capacitance of which depends on the load capacitance of the crystal resonator. If the externalclock is used, the clock must be supplied to XTI, and XTO must be open.

The PCM2903B has an internal power-on reset circuit, which triggers automatically when VDD (pin 27) exceeds2.5 V typical (2.7 V to 2.2 V). Approximately 700 μs is required until internal reset release.

Digital Audio Interface

The PCM2903B employs both S/PDIF input and output. Isochronous-out data from the host are encoded to theS/PDIF output and the DAC analog output. Input data are selected as either S/PDIF or ADC analog input. Whenthe device detects an S/PDIF input and successfully locks on the received data, the isochronous-in transfer datasource is automatically selected from S/PDIF itself; otherwise, the data source selected is the ADC analog input.

This feature is a customer option. It is the responsibility of the user to implement this feature.

Supported Input/Output Data

The following data formats are accepted by the S/PDIF input and output. All other data formats are unable to useS/PDIF.• 48-kHz 16-bit stereo• 44.1-kHz 16-bit stereo• 32-kHz 16-bit stereo

Any mismatch of the sampling rate between the input S/PDIF signal and the host command is not acceptable.Any mismatch of the data format between the input S/PDIF signal and the host command may cause unexpectedresults, with the following exceptions:• Recording in monaural format from stereo data input at the same data rate• Recording in 8-bit format from 16-bit data input at the same data rate

A combination of these two conditions is not acceptable.

For playback, all possible data-rate sources are converted to 16-bit stereo format at the same source data rate.

Channel Status Information

The channel status information is fixed as consumer application, PCM mode, copyright, and digital/digitalconverter. All other bits are fixed as 0's except for the sample frequency, which is set automatically according tothe data received through the USB.

Copyright Management

Isochronous-in data are affected by the serial copy management system (SCMS). When the control bit indicatesthat the received digital audio data are original, the input digital audio data are transferred to the host. If the dataare indicated as first generation or higher, the transferred data are routed to the analog input.

Digital audio data output is always encoded as original with SCMS control.




D+/D–

SEL1 (Pin 9)

2.5 V (Typ)

0 V

Internal Reset

Ready for Setup

Attach(Connect to USB Bus)

SOF

Ready for Playback

Bus Reset Set Configuration

SOF SOF

BPZ

Bus Idle

3.3 V (Typ)

5 V = VBUS(Typ)

1 Audio Datast

2 Audio Datand

V (Pin 27)DD

SSPND

V LOUTV ROUT

700 sm Device Setup 1 ms

T0055-03



INTERFACE SEQUENCE

Power On, Attach, and Playback Sequence

The PCM2903B is ready for setup when the reset sequence has finished and the USB bus is attached. In orderto perform certain reset sequences defined in the USB specification, VDD, VCCC, VCCP1, VCCP2, and VCCX must riseup within 10 ms / 3.3 V. After connection has been established by setup, the PCM2903B is ready to accept USBaudio data. While waiting, the audio data (idle state) and analog output are set to bipolar zero (BPZ).

When receiving the audio data, the PCM2903B stores the first audio packet, which contained 1-ms audio data,into the internal storage buffer. The PCM2903B starts playing the audio data when detecting the next start offrame (SOF) packet, as illustrated in Figure 35 and Figure 36.

Figure 35. Attach After Power On




D+/D–

V LOUTV ROUT

Audio DataAudio Data Last Audio Data

Detach

5 V = VBUS(Typ)

SOF SOF SOF SOF SOF

1 ms

SEL1 (Pin 9)

T0056-03

D+/D–

SEL1 (Pin 9)

2.5 V (Typ)

0 V

Internal Reset

Ready for Setup

SOF

Ready for Playback

Bus Reset Set Configuration

SOF SOF

BPZ

Bus Idle

3.3 V (Typ)

5 V = VBUS(Typ)

1 Audio Datast

2 Audio Datand

V (Pin 27)DD

SSPND

V LOUTV ROUT

700 sm Device Setup 1 ms

T0273-01



Figure 36. Power-On Under Attach

Play, Stop, and Detach Sequence

When the host finishes or aborts the playback, the PCM2903B stops playing after the last audio data haveplayed, as shown in Figure 37.

Figure 37. Play, Stop, and Detach Sequence




5 ms

D+/D–

SSPND

Idle

Active ActiveSuspend

T0057-02

D+/D–

V LINV RIN

1 ms

SET_INTERFACEAudio Data

IN Token

Audio Data

IN Token

Audio Data

IN Token

SOF SOF SOF SOF SOF

T0259-01



Record Sequence

The PCM2903B starts the audio capture into the internal memory after receiving the SET_INTERFACEcommand, as shown in Figure 38.

Figure 38. Record Sequence

Suspend and Resume Sequence

The PCM2903B enters the suspend state after it detects a constant idle state on the USB bus (approximately5 ms), as shown in Figure 39. While the PCM2903B enters the suspend state, the SSPND flag (pin 28) isasserted. The PCM2903B wakes up immediately after detecting a non-idle state on the USB bus.

Figure 39. Suspend and Resume Sequence




28

27

26

25

24

23

22

21

20

19

1

2

3

4

5

6

7

8

9

10

PCM2903B

SSPND

XTI

VDD

DGND

DOUT

DIN

XTO

VCCP2

AGNDX

VCCX

D+

D–

MUTE/Power Down

C1

11

12

13

14

D+

D–

VBUS

DGNDU

HID0

HID1

HID2

SEL0

SEL1

VCCC

AGNDC

V LIN

V RIN

VCOM

18

17

16

15

VCCP1

V LOUT

V ROUT

AGNDP

22 W

22 W

V (3.3 V)DD

1.5 k 3W ´

IC1

1.5 kW

GND

VBUS

1 MW

C2

C9

C10

V (3.3 V)CC

1 MW

12 MHz

C5

C6

C3

C4

C7

C8

C11

C12

LPF,Amp

LPF,Amp

S0312-02



APPLICATION INFORMATION

TYPICAL CIRCUIT CONNECTION

Figure 40 illustrates a typical circuit connection for a simple application. The circuit illustrated is for informationonly. The entire board design should be considered to meet the USB specification as a USB-compliant product.

NOTE: IC1 must be driven by VDD with a 5-V tolerant input.C1, C2, C3, C4, C7, C8: 10 μFC5, C6: 10 pF to 33 pF (depending on crystal resonator)C9, C10, C11, C12: The capacitance may vary depending on design.

Figure 40. Self-Powered Configuration

Operating Environment

For current information on the PCM2903B operating environment, see the Updated Operating Environments forPCM270X, PCM290X Applications application report, SLAA374.



http://www.ti.com/product/pcm2903b?qgpn=pcm2903bhttp://www.ti.comhttp://www.ti.com/lit/pdf/SLAA374http://www.go-dsp.com/forms/techdoc/doc_feedback.htm?litnum=SLES228&partnum=PCM2903Bhttp://www.ti.com/product/pcm2903b?qgpn=pcm2903b

PACKAGE OPTION ADDENDUM

www.ti.com 10-Dec-2020

Addendum-Page 1

PACKAGING INFORMATION

Orderable Device Status(1)

Package Type PackageDrawing

Pins PackageQty

Eco Plan(2)

Lead finish/Ball material

(6)

MSL Peak Temp(3)

Op Temp (°C) Device Marking(4/5)

Samples

PCM2903BDB NRND SSOP DB 28 50 RoHS & Green NIPDAU Level-1-260C-UNLIM -25 to 85 PCM2903B

PCM2903BDBR NRND SSOP DB 28 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM -25 to 85 PCM2903B (1) The marketing status values are defined as follows:ACTIVE: Product device recommended for new designs.LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.PREVIEW: Device has been announced but is not in production. Samples may or may not be available.OBSOLETE: TI has discontinued the production of the device.

(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substancedo not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI mayreference these types of products as "Pb-Free".RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of

TAPE AND REEL INFORMATION

*All dimensions are nominal

Device PackageType

PackageDrawing

Pins SPQ ReelDiameter

(mm)

ReelWidth

W1 (mm)

A0(mm)

B0(mm)

K0(mm)

P1(mm)

W(mm)

Pin1Quadrant

PCM2903BDBR SSOP DB 28 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1

PACKAGE MATERIALS INFORMATION


Pack Materials-Page 1

*All dimensions are nominal

Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)

PCM2903BDBR SSOP DB 28 2000 853.0 449.0 35.0

PACKAGE MATERIALS INFORMATION


Pack Materials-Page 2

www.ti.com

PACKAGE OUTLINE

C

26X 0.65

2X8.45

28X 0.380.22

8.27.4 TYP

SEATINGPLANE

0.05 MIN

0.25GAGE PLANE

0 -8

2 MAX

B 5.65.0NOTE 4

A

10.59.9

NOTE 3

0.950.55

(0.15) TYP

SSOP - 2 mm max heightDB0028ASMALL OUTLINE PACKAGE

4214853/B 03/2018

1

1415

28

0.15 C A B

PIN 1 INDEX AREA

SEE DETAIL A

0.1 C

NOTES: 1. All linear dimensions are in millimeters. Any dimensions in parenthesis are for reference only. Dimensioning and tolerancing per ASME Y14.5M. 2. This drawing is subject to change without notice. 3. This dimension does not include mold flash, protrusions, or gate burrs. Mold flash, protrusions, or gate burrs shall not exceed 0.15 mm per side. 4. This dimension does not include interlead flash. Interlead flash shall not exceed 0.25 mm per side.5. Reference JEDEC registration MO-150.

A 15DETAIL ATYPICAL

SCALE 1.500

www.ti.com

EXAMPLE BOARD LAYOUT

0.07 MAXALL AROUND

0.07 MINALL AROUND

28X (1.85)

28X (0.45)

26X (0.65)

(7)

(R0.05) TYP


4214853/B 03/2018

NOTES: (continued) 6. Publication IPC-7351 may have alternate designs. 7. Solder mask tolerances between and around signal pads can vary based on board fabrication site.

LAND PATTERN EXAMPLEEXPOSED METAL SHOWN

SCALE: 10X

SYMM

SYMM

1

14 15

28

15.000

METALSOLDER MASKOPENING

METAL UNDERSOLDER MASK

SOLDER MASKOPENING

EXPOSED METALEXPOSED METAL

SOLDER MASK DETAILS

NON-SOLDER MASKDEFINED

(PREFERRED)

SOLDER MASKDEFINED

www.ti.com

EXAMPLE STENCIL DESIGN

28X (1.85)

28X (0.45)

26X (0.65)

(7)

(R0.05) TYP


4214853/B 03/2018

NOTES: (continued) 8. Laser cutting apertures with trapezoidal walls and rounded corners may offer better paste release. IPC-7525 may have alternate design recommendations. 9. Board assembly site may have different recommendations for stencil design.

SOLDER PASTE EXAMPLEBASED ON 0.125 mm THICK STENCIL

SCALE: 10X

SYMM

SYMM

1

14 15

28

IMPORTANT NOTICE AND DISCLAIMER

TI PROVIDES TECHNICAL AND RELIABILITY DATA (INCLUDING DATASHEETS), DESIGN RESOURCES (INCLUDING REFERENCE DESIGNS), APPLICATION OR OTHER DESIGN ADVICE, WEB TOOLS, SAFETY INFORMATION, AND OTHER RESOURCES “AS IS” AND WITH ALL FAULTS, AND DISCLAIMS ALL WARRANTIES, EXPRESS AND IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY RIGHTS.These resources are intended for skilled developers designing with TI products. You are solely responsible for (1) selecting the appropriate TI products for your application, (2) designing, validating and testing your application, and (3) ensuring your application meets applicable standards, and any other safety, security, or other requirements. These resources are subject to change without notice. TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource. Other reproduction and display of these resources is prohibited. No license is granted to any other TI intellectual property right or to any third party intellectual property right. TI disclaims responsibility for, and you will fully indemnify TI and its representatives against, any claims, damages, costs, losses, and liabilities arising out of your use of these resources.TI’s products are provided subject to TI’s Terms of Sale (www.ti.com/legal/termsofsale.html) or other applicable terms available either on ti.com or provided in conjunction with such TI products. TI’s provision of these resources does not expand or otherwise alter TI’s applicable warranties or warranty disclaimers for TI products.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265Copyright © 2020, Texas Instruments Incorporated

http://www.ti.com/legal/termsofsale.htmlhttp://www.ti.com

FEATURESAPPLICATIONSDESCRIPTIONABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICSPIN ASSIGNMENTSFUNCTIONAL BLOCK DIAGRAMBLOCK DIAGRAM OF ANALOG FRONT-END (RIGHT CHANNEL)

TYPICAL CHARACTERISTICS: ADCTYPICAL CHARACTERISTICS: DACTYPICAL CHARACTERISTICS: ADC OUTPUT SPECTRUMTYPICAL CHARACTERISTICS: DAC OUTPUT SPECTRUMTYPICAL CHARACTERISTICS: SUPPLY CURRENTTYPICAL CHARACTERISTICS: ADC DIGITAL DECIMATION FILTER FREQUENCY RESPONSETYPICAL CHARACTERISTICS: ADC DIGITAL HIGH-PASS FILTER FREQUENCY RESPONSETYPICAL CHARACTERISTICS: ADC ANALOG ANTIALIASING FILTER FREQUENCY RESPONSETYPICAL CHARACTERISTICS: DAC DIGITAL INTERPOLATION FILTER FREQUENCY RESPONSETYPICAL CHARACTERISTICS: DAC ANALOG FIR FILTER FREQUENCY RESPONSETYPICAL CHARACTERISTICS: DAC ANALOG LOW-PASS FILTER FREQUENCY RESPONSEDETAILED DESCRIPTIONUSB INTERFACEDEVICE CONFIGURATONInterface #0Interface #1Interface #2Interface #3End-PointsClock and ResetDigital Audio InterfaceSupported Input/Output DataChannel Status InformationCopyright Management

INTERFACE SEQUENCEPower On, Attach, and Playback SequencePlay, Stop, and Detach SequenceRecord SequenceSuspend and Resume Sequence

APPLICATION INFORMATIONTYPICAL CIRCUIT CONNECTIONOperating Environment

Documents

Stereo Audio Codec with USB Interface, Single-Ended Analog … · 2020. 12. 31. · Burr-Brown Audio Not Recommended for New Designs PCM2903B SLES228 – DECEMBER 2008 STEREO AUDIO